Valve lifter



Dec. 15. 1931. N. PETERSON 1,836,334

VALVE LIFTER Filed Feb. 21, 1931 2 Sheets-Sheet l In venior jVaZs Fe $67602,

A llorney Dec. 15, 1931, N. PETERSON 7 ,334

VALVE LIFTER Filed Feb. 21, 1951 2 Sheets-Sheet 2 fiamaolizm A llorncy j Invntor L JVeZs Fed's 71907;, N

Patented D ec. 15, 1931 UNITED STATES PATENTD F C f NELS PETERSON, OF DELANOQGALIFORNTA v VALVE LIFTER Application filed February 21', 1931. Serial No.-51 7,58

This invention relates to certain new and useful improvements in valve lifters, and the primary object of this invention is in the provision of a tool of such a type that will be inexpensive yet strong and durable in construction and which, further, is of such a construction, as to eliminate the use of the screw and nut devices usually employed in said tools for causing the jaws of the tool to approach or separate as required when using the tool.

Other objects and advantages of the invention will become apparent from a study of the following description, taken in connection with the accompanying drawings wherein:

Figure 1 is a side elevational view showing the tool retracted,

Figure 2 is a top plan view.

Figure 3 is a fragmentary detail sectional elevational view taken substantially on the line 3-3 of Figure 1.

Figure 4: is a View similar to Figure 1 but showing the tool expanded and compressing a valve spring.

Figures 5 and 6 are transverse sectional views taken substantially on the lines 55 and 66 respectively of Figure 4;.

Referring more in detail to the drawings it will be seen that the valve spring lifter comprises two parallel arms 5-5 provided at corresponding ends with forked jaws 66. 7 is a thrust shaft interposed between and parallel with the arms 5, 5 being connected to said arm by pairs of links 8, 9 and 10.

The links referred to, have their outer ends pivoted in the troughs, that is between the sides of the arms 5-5 as at 11. The outer ends of the links 8 are pivoted to the arms 5 adjacent the jaws 6 and at their inner ends are pivoted as at 12 to a suitable collar 13 fixed on the inner end of the thrust shaft 7.

The inner ends of the links 10 are pivoted as at 14 to a collar 15 fixed on the outer end of the thrust rod 7. Links 9 have their inner ends pivoted as at 16 on an intermediate collar 17 shiftable lonigtudinally of the thrust rod 7 A. coil spring the thrust rod 18 is disposed circumjacent and interposed between the collars 15 and 17, the ends of the spring 18 being engaged with the collars 15 and 17 as at 19 and 20. 'Spring 18 normally urges collar 17 toward collar 15 for normally expanding the tool for urging the jaws 66' apart. See Figure at.)

Acting against spring 18 for retaining the tool in a retracted condition or in that condition suggested in Figure 1, there is provided on one arm 5 remote from its aw 6 a spring arm 21 secured at one end as at 22 to said arm 5, and the free'end ofthe arm 21 is provided with a catch lug 23 for engage ment with a complemental stop member 24 provided on the other of the arms 5 remote from its jaw 6, the last mentioned arm 5 hav: ing'the web; portion thereof suitably aper turedwhereby the lugged' end 23 may pass through the web to engage the member 24 when the arms 55,have been forced towardone another by the expanding spring 18.

From the construction as thus described, the mode of operation of the device is readily apparent to those skilled in the art. In Fig ure 4 I have shown one jaw 6 engaging the tappet 25 while the other jaw 6 is engaged with the washer 26 of the valve spring 27 and the spring has'been compressed to clear the pin 28,- whose removal will permit the with drawal of the valve stem 29.

Even thoughI have herein shown and described the preferred embodiment of the invention, it is to be understood that the same is susceptible of changes, modifications and improvements coming within the scope of the appended claims.

Having thus described my invention, what I claim as new is:

1. A valve lifter comprising arms pro-' vided at adjacent ends with jaw members, a thrust shaft positioned between said arms, a pair of relatively spaced fixed collars on said shaft, links pivotally connected with said collars and said arms, a collar shiftable on said thrust shaft between the first mentioned collars, links connecting said shiftable collar with said arms, and a normally contracted expansible member connecting said shiftable collar with one of the first mentioned collars.

2. A tool of the character described comprising in combination a pair of parallel arms, a thrust shaft positioned between said arms and provided With means for moving said shaft longitudinally relatively to said 5 arms, said means including links pivotally engaged with said shaft and said arms, a member shiftable on said shaft, links connecting said member with said arms, and a spring convoluted about the shaft, means anchoring one end of the spring, said spring at its free end being engaged with said shiftable member.

3. A tool of the character described comprising in combination a pair of parallel.

arms, a thrust shaft positioned between said arms and provided with means for moving said shaft longitudinally relatively to said arms, said means-including links pivotally engaged with saidshaft and said arms, a

; member shiftable on said shaft, links connecting said member with said arms, and a spring convoluted about the shaft, means anchoring one end of the spring, said spring at its free end being engaged with said shift- 5, able member, said spring. normally urging said shiftable member in one direction relative-t0 the shaft for moving said arms apart, and latch means, acting, oppositely to said spring for retaining said arms, con- --tracted.

4. A valve lifter comprising in combina tion apair of arms, a thrust shaftipositioned between said arms, a pair of relatively-spaced collars fixed on said shaft, links connecting -=said collars with said arms, a shiftable mem-' her on said'shaft, links pivotally connected with: said shiftable member and said arms, spring means connecting said shiftable mem her with one of said collars for normallyurg 40:;ing said arms-apart, a spring catch mounted onone of said arms, and a lug on the other-of said arms engageable with the catch when said arms are moved toward one another.

In testimony whereof I aflix my signature.

.45 NELS PETERSON 

